I currently use the Amazing White Universal whitening kit. The quality is great! It whitens gently and most importantly is painless and safe for the client. Other good kits are Beyond MAX and Belle MAX Bleach. Dentists also share their positive experiences with these kits. Do not forget that just as important is the device with which you carry out a whitening session. You may be interested to know about Philips Zoom devices. On the main site you will find the characteristics and guide for philips zoom https://bleach-infiniter.com/ . The manufacturer has several versions of the equipment.